Spring-tooth harrow



-(No Model.) 3 Sheets-Sheet 1. D. 0; EVEREST & L. G. LULL.

SPRING TOOTH HARROW.

Patented Mar. 13, 1894.-

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(No Model.) 3 Sheets' Sheet 2.

D. 0. EVEREST 8v L. G. LULL. SPRING TOOTH HARROW.

No. 516,302. Patented Mar. 13', 1894.

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NITED STATES PATENT OFFICE.

DAVID 0. EVEREST, OF PINE GROVE, AND LYNN C. LULL, OF KALAMAZOO,MICHIGAN.

SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 516,302, dated March13, 1894. Application filed January 9, 1893- Serial No. 457,826- (Nomodel.)

To all whom it may concern.-

Be it known that we, DAVID 0. EVEREST, residing in the township of PineGrove, in the county of Van Enron, and LYNN O. LULL, residing in thecity and county of Kalamazoo, State of Michigan,oitizens of the UnitedStates, have invented certain new and useful Improvements inSpring-Tooth Harrows, of which the following is a specification.

Our invention relates to improvements in float harrowsand moreparticularly to that class of harrows having curved teeth of springsteel, that are adjusted in their fastening and also adjustable by meansof a lever.

The objects of our invention are first, to provide a clip for holdingthe teeth, in which the shanks of the teeth will come bet ween the boltsand the ground; second, to provide a simple and strong fastening forattaching the rocking cross bars in the frames; third, to provide acatch for the adjusting lever capable of varying the adjustment in smallamounts; fourth, to provide a harrow of the so-called butterfly shapethat is adjustable by a lever. We accomplish these objects by thedevices shown in the accompanying drawings, in which Figure 1, isa planview of our harrow. Fig. 2, is a view of the lever from line 2-2 ofFig. 1. Fig. 3, is a view of the lever on line 33 of Fig. 2. Fig. at, isa view on line 44 of Fig. 1, showing method of attaching the cross bars.Fig. 5, is a view of one of the hinge joints between the sections of theharrow from line 55 of Fig. 1. Fig. 6, is a detail top viewof thefasteningof atooth to the cross bar. Fig. 7, is a view on line 7--7 ofFig. 6. Fig. 8, is a top View of a modified form of the fastening forattaching the teeth. Fig. 9, is a View on line 22 of Fig. 8 and Fig. 10is a view on line 3-3 of Fig. 8.

Similar letters of reference refer to similar parts throughout theseveral views.

Our invention consists of a harrow frame in two sections hinged togethermaking a double harrow of the so-called butterfly shape. The sections ofthe frame are made of double T steel bent into the form appropriate fora harrow of the butterfly shape. Hollow bars A, run diagonally acrossthe frame and are held in place by means of the cap F, and the of theshoulder n -It willbe clear that either the cap F, or the enlarged endof the rod would be sufficient to keep the bar A, in place i but weprefer to put on both the caps F, and enlarge the ends of the rod nalso. The caps 'F, on the inside of the sections have a projectingportion or lug a, which passes up to alike lug on the opposite frame andare joined by the pivot 0.. The inside ends being in a straight line topermit the raising of one half of the harrow at any time whenever itshall be necessary. The teeth D, are attached to the bars A, by means ofthe clips shown in Figs. 6 and 7, which show the teeth D, at-' tached atan angle to the bar so that they will draw straight back. They might beattached at right angles to the bar as shown in Figs. 8, 9, and 10, atpoints on the bars that would bring the points of the teeth into thesame relative positions as shown in the plan view in Fig. 1.

For convenience and clearness in description we will first explain ourclip in the form that holds the tooth at right angle to the bar; andthen point out the slight variation of the clip where it holds the toothD, at an acute angle to the bar A. The lower piece B, of the clip hastwo parallel side walls w, w, the same distance apart as the width ofthe teeth, a cross portion 2, passes under the tooth and two crossportions y, y, pass above the tooth and connect the two parallel sidesof the piece together and hold the tooth D as in a yoke. The side wallsso, being the same distance apart as the width of the tooth prevent thetooth having any sidewise motion. The side walls are so formed that whenthe lower part of the clip is bolted to the upper half it draws thetooth tight against the cross bar A.

In the cross portions 3 y, of the clip are bolt holes for the bolts u,a. The bolts are placed in these holes before the tooth is slippedsegment cl.

into the clip. It will thus be seen that the ends of the bolts are abovethe tooth and are so protected from wear. The upper piece 0, of the clipruns square across the bar A, and is shaped to fit the outer-surface ofit. There is a pintle 'L' adapted .to fit a hole drilled into the bar.There is a bolt hole in each end of the piece 0, corresponding to thebolt holes in the piece B, below. As the parts 13, and G, of the clip donot touch each other, it will be observed that by loosening one bolt andtightening the other each tooth can be adjusted on the bar by itself.The only difierence between this clip that holds the tooth square acrossthe bar A, and the one that holds the tooth at an angle is that thewalls of the lower piece B of the clip are placed at the desired angleto the bar and the bolt holes drilled in such a position in the crossportions :1, 11 that the upper piece G, of the clip still crosses thebar A, at right angles. This will be clear on examining Figs. 6 and 7.

To each of the cross bars A, of each section is attached an upwardlyprojecting arm 8. The arms are attached by a clip and have a pintle thatprojects into a hole drilled into the bar A, to hold them the same as inthe clip for the tooth. To the upperends of the arms 8, is pivoted ahorizontal bar cs0 that it is at the same angle with all the arms 8. Atone end of the horizontal bar 6 is attached a segment of a circle havingteeth on its periphery. A lever h projects up at the same point and isbolted at its lower end to the upwardly projecting arm .9 at that point.On the lever h, is a catch operated by the latch trip at the top ot thelever h. The catch has two or more teeth that catch between the teeth ofthe The teeth on the segment are small and regular and the teeth of thecatch correspond. This makes it possible to shift the lever over thesmall space taken up by a single tooth of the segment and yet it holdsas firmly as though the teeth were larger.

WVe are aware that harrows have been in use prior to our invention inwhich the teeth were adjusted by a lever so we do not claim thatbroadly, but

WVhat we do claim, Letters Patent, is-

1. In a harrow the tooth barA united to the tooth D by the clipconsisting of the combination of the part 0 fitted to the upperperiphery of the bar A and the piece J5,hav1ng side walls as as. andcross connecting portions 1 y. and z the cross portion 2 having a seatfor the tooth D and the cross portion y. 'y. united by bolts u 16 to theupper part (J, so tooth D is between the heads of the bolts u. u. andthe ground, substantially as described for the purpose specified.

2. The combination in a harrow having rocking bars controlled by a leverof the frame E, the rod 01., having the shoulders 'n', and rocking barsadapted to rock on said rod n, for the purpose specified.

3. In a harrow having rocking bars bearing teeth controlled by a leverthe combination of the shouldered rod n, the cap F, the frame E, at oneend and the cap F, with the lugs ct, at the other end, bearing thehollow cross bar A, substantially as described for the purposespecified.

4. In a double float harrow, the combination of the frame E, the rods nwith shoulder at, the caps F, the hollow cross bars A, hearing the teethD, attached by the clip, consisting of the parts B and G. The lever h,the fine toothed segment d, and the toothed catch f, the arms 3, thehorizontal bar e, the lugs a pivoted at a, all substantially asdescribed for the purpose specified.

In witness whereof we have hereunto set our hands and seals in thepresence of two witnesses.

DAVID 0. EVEREST. [L. s.] LYNN G. LULL. [L. s.] Witnesses:

DALLAS BOUDEMAN, JOHN W. ADAMS.

and desire to secure by

